Pasqtjale baeti



P. RAFFI.

ELECTRIC INSULAIOR.

APPLICATION FILED JULY 9.1914.

UNITED STATES PATENT OFFICE.

PASQULE RAFFI, 0F ROME, ITALY.

ELECTRIC INSULATOR.

Application filed Julv 9, 1914.

1 0 all whom t may concern.'

Be it known that I, PASQUALE Barri, en-

, gineer, subject of the King of Italy, resident of Rome, in the Kingdom of Italy, No. 46 Via S. Basilio, have invented new and useful Improvements in or Relating to Electric Insulators, of which the following is a speciiication.

The present invention consists in an arrangement whereby, in the event of breakage of the insulating material of an insulator of porcelain, glass or other material, the inner and outer metal parts thereof remain mechanically connected together so that, even when the porcelain, glass or the like part of an insulator is destroyed, the connection between the conductor and support or between the conductor and the other insulators (in the case of insulators in series) should not fail for any reason.

The invention chiefly consists in securing or connecting the central rod or like member to a metal layer or core deposited so to fill up completely or partly the interior oit the insulator, by electric, chemical or electro-chemicaly processes, or in other words formed n situ, so that the said metal core should have wholly or in part a cross-section of a larger outside diameter than the minimum diameter of the supporting clip, armature or cap, or of a metal layer forming an extension of an ordinary clip, deposited on the outer surface of the insulator, by the same means as described above, or mounted therein by the usual mechanical means.

The accompanying drawing shows b y way of example two constructions according to this invention.

Figure l shows an insulator mounted on a support and provided with an inner metal core and an outer layer.

Fig. 2 shows an insulator mounted on a support and provided with an inner metal layer and with an outer layer.

Fig. 3 is a section on line A-B of Fig. 2.

The interior of the' insulator --a- (whether it be supported by a support in the shape of a bolt of square cross-section as in Fig. 1, or by a support in the shape of a screwthreaded bolt as in Fig. 2, or by any desired support), has a diameter greater than the minimum diameter of the outer neck of the insulator surrounded by a clip, armature or the like, or by its extension, and

Specification of Letters Patent.

Patented Dec. 9, 1919.

ser-iai No. 850,059.

is completely lilled (Fig. l) or completely or partly covered (Fig. 2) by an electric, chemical or electro-chemical deposit of metal or metal alloy, to which can be secured by screws or otherwise, or connected in any other manner, the rod or like member of the insulator. Vhen the recess is covered only with a single layer -d-, and not lled nietallically, it will be possible, when it is considered desirable from mechanical and electric points of view, to complete the lilling of the said recess with cements, metal alloys, or any other materials.

A metal layer f2- forming a connection between the insulator and suitable metal parts g-- of the armature or suspension of the line may be deposited by the same process on the outside of the insulator.

The relative position of the layers (1- and -eZ-, of the layer cwand of the core b-, and the relative dimensions are such that even if the insulating materia-l afinterposed were to fail, the part -bor -alcould not come out of the part -c-.

It is obvious that the shape and construction could vary from those described and illustrated without departing from the invention. K

Having now particularly described and ascertained the nature of myv said invention and in what manner the same is to be performed, I declare that what I claim is l. In an electric insulator, in combination a body member of insulating material provided with a cavity and having a large head, a Haring collar and a restricted neck between them; an annular metallic-clip crimped around said neck, a metallic liner for said cavity, the walls of the body member being of approximately uniform thickness, whereby the liner will be prevented from coming out through the crimped portion of the clip in case the body member should become destroyed.

2. In an electric insulator, in combination a body member of insulating material provided with a cavity and having a large head, a flaring collar and a restricted neck between them; an annular metallic-clip crimped around said neck, a metallic liner for the largest and narrowest part of said cavity, a supporting shank rigidly attached to the narrowest portion of said liner, the walls 0f greatest diameter of said cavit Y exceeding.

that of the neck, an outer meta lic clip embracing said neck, a metallic core formed in the inner cavity of said insulator, a support for the insulator engagin `with said core; the outside diameter of sai metallic core coinciding with the diameter of the cavity, whereby said core is prevented from coming out of the clip even if the body member of insulating material should become destroyed.

4. In an electric insulator, the combination of a body member of insulating material having an inner cavity, an outer mdallic supporting member, a metallic core or filler formed in said inner cavity by metallic deposition, whereby the shape and dimensions of said core conform to those of said cavity and the core is prevented from coming out of the supporting member when the body of insulatin materlal is destroyed.

In testimonfv W ereof I hereunto aix my signature in t e presence of two witnesses.

PASQUALE RAFFI. Witnesses:

` DUILIo Naimom,

ToMMAso BAn'roLUzi. 

